FOR

@echo off & setlocal & set /a n=-1
set /p FilePath=文件路径(默认%ComSpec%)：
if not defined FilePath set FilePath=%ComSpec%
set FilePath=%FilePath: =%
set FilePath=%FilePath:\= %
for %%i in (%FilePath%) do set /a n+=1
echo 目录层数：%n%
pause
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